Answer
$O_{2}$
Work Step by Step
The most stable form of any element is when its $\Delta H_{f}^{\circ}=0$. Therefore, the more stable form is $O_{2}$.
Chemistry 12th Edition
by Chang, Raymond; Goldsby, Kenneth
Published by
McGraw-Hill Education
ISBN 10:
0078021510
ISBN 13:
978-0-07802-151-0
Chapter 6 - Thermochemistry - Questions & Problems - Page 264: 6.46
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